The ReadyLIFT® Jeep Wrangler JK Cross Flex Off Road Suspension system utilizes the best engineered components to create the Cross Flex Short Arm Kit. The heart of the system is the development of beefy 1-3/4" - 5/16" DOM tube steel front lowers and rear upper control arms which have been paired with the ReadyLIFT® TCT Joint with Terrain Control Technology and the Currie Johnny Joint® - the TCT Joint is a Dual Polymer Flex Joint that allows maximum articulation. The 2.5" of lift Eibach® performance wound Off Road coil springs. This lift includes heavy duty extended length rear sway bar end links that do not compromise on and off road handling, while allowing flexing capabilities.